when_year=2000 ensures it is never scheduled, even if it is not ignored

$HCRON_SELF_CHAIN updated with event name

guarantees to call the original event ($HCRON_EVENT_NAME[-1]) no matter how it is called

Conclusion

In some situations, we may not want to create separate events for each host we want to launch on. These methods provide alternatives using event chaining and indexing. In effect, given a :-separated list of hosts (e.g., HOSTS) and specially configured next_event and failover_events settings, we can select a host to launch on using #HCRON_SELF_CHAIN as an index to iterate over the host list.